Battery storage & solar

This is an excerpt from the minutes from our meeting in February 2018.

Battery storage and solar: Hounslow case study

Chris Little, London Borough of Hounslow

7 Boroughs came together to form the West London Alliance Energy Manager Group (WLA). The main intention of WLA was to share
energy saving and carbon reduction ideas in order to identify collaborative projects achieving the same goals, taking advantage of the scales of economy.

The Western International Market is a night-operating wholesale market site with a combined roof area of about
11,000m2.

It was the largest PV array in the capital at the time with simultaneous charge/discharge, and was therefore
ground-breaking.

The site had a 3.6MWh/annum consumption, with a spike at 6am where everyone plugged in their forklift trucks after the night
shift. This was addressed with time-switches to shift the load into the PV curve.

1.73MW of PV was installed, accounting for 40% of the site’s consumption, alongside 240kW battery storage. The payback is 7.2years.

Hounslow is also exploring DSR and high frequency response, to sell power back to Heathrow. Other sites are also being explored for a 12MW scheme.

Energy Management in London Boroughs

The London Boroughs Energy Group exists to share knowledge and support joint working on energy related issues between public sector bodies in and around
London.

We are a forum for Energy Managers from the London Boroughs and other public sector organisations in London and the surrounding counties. Membership of LBEG provides excellent opportunities to share knowledge and best practice, network with colleagues and associates and keep up to date with activity to promote energy
efficiency across London.